典型反射镜头的环状光圈导致失焦影像呈现明显的“亮环”效应。
The annular aperture of typical mirror lenses results in out-of-focus images with a pronounced 'bright ring' effect.
该方法首先将少环配电网络利用叠加原理分解为两个网络：不含环状结构的纯辐射状网络和不含辐射状结构的纯环状网络。
The weakly meshed network is firstly divided into two networks using the superposition principle: one is the pure radial network and the other is the pure meshed network.
当存在单环网时，本文利用叠加定理和戴维南等效定理把单环状的配电网转化成两条辐射状的馈线。
The paper transforms it into two radial networks with Thevenin's theorem and superposition theorem when there is a meshed network.
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